diff --git a/libavcodec/libamr.c b/libavcodec/libamr.c
index 3b103b8579..52c211835a 100644
--- a/libavcodec/libamr.c
+++ b/libavcodec/libamr.c
@@ -57,6 +57,22 @@
 
 #include "avcodec.h"
 
+static void amr_decode_fix_avctx(AVCodecContext *avctx)
+{
+    const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
+
+    if (!avctx->sample_rate)
+        avctx->sample_rate = 8000 * is_amr_wb;
+
+    if (!avctx->channels)
+        avctx->channels = 1;
+
+    avctx->frame_size = 160 * is_amr_wb;
+    avctx->sample_fmt = SAMPLE_FMT_S16;
+}
+
+#if CONFIG_LIBAMR_NB
+
 #include <amrnb/interf_dec.h>
 #include <amrnb/interf_enc.h>
 
@@ -90,22 +106,6 @@ static int getBitrateMode(int bitrate)
     return -1;
 }
 
-static void amr_decode_fix_avctx(AVCodecContext *avctx)
-{
-    const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
-
-    if (!avctx->sample_rate)
-        avctx->sample_rate = 8000 * is_amr_wb;
-
-    if (!avctx->channels)
-        avctx->channels = 1;
-
-    avctx->frame_size = 160 * is_amr_wb;
-    avctx->sample_fmt = SAMPLE_FMT_S16;
-}
-
-#if CONFIG_LIBAMR_NB
-
 typedef struct AMRContext {
     int   frameCount;
     void *decState;